SeaLux 30-54" Adjustable Aluminum Boat Cover Support Pole System Props up and supports a boat cover to reduce and prevent debris and water build-up Telescopes from 30-1/2" to 54-1/2" and twists to lock in position Includes a broad-surface design cap to distribute cover (5" diameter) tension evenly and a 9" diameter Base stand to stabilize the boat cover support system in place. Support Pole Constructed of Lightweight durable anodized aluminum construction built to last. Cap and Base made of tough, rustproof, ABS PVC Supports any area of a boat cover